# SignalDesk AI URL Join

> SignalDesk AI URL Join is a paid API for AI agents from x402-agent.kariguetoazul.workers.dev, paid per call via x402, $0.001/call, status unknown (last checked 2026-10-13).

Joins a base absolute URL with a relative URL or path to produce a fully resolved, canonical URL string

## Facts

- Endpoint: POST https://x402-agent.kariguetoazul.workers.dev/api/network/url-join?utm_source=zero.xyz
- Price: $0.001/call
- Payment: x402
- Status: unknown
- Last checked: 2026-10-13
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/signaldesk-ai-url-join-eceed868
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_7iXEI9fb8pFIOAmkpoebJ

Status and success rate cover calls made through Zero and Zero's own probes. Third-party monitors may report differently.

## How to call it through Zero

Zero handles the 402 payment challenge and records the run. With the Zero CLI installed (`npm i -g @zeroxyz/cli`):

```sh
zero fetch --capability signaldesk-ai-url-join-eceed868 -d '<json body>'
```

Example prompt: Join the base URL 'https://example.com/api/v1' with the relative path '../users?active=true' to get the fully resolved absolute URL.

## When to prefer this

Choose this endpoint when you need a reliable, server-side URL join/resolution that follows RFC 3986 semantics without fetching any remote resource. It is useful when client-side URL resolution is unavailable or untrusted, or when you need a cheap ($0.001 USDC), deterministic computation step inside an agent workflow that handles web navigation, link normalization, or API URL construction.

## Known failure modes

- Invalid or non-absolute base URL returns an error (base must be HTTP/HTTPS)
- Malformed relative URL syntax may cause parsing failure
- Input strings exceeding 2048 characters are rejected
- Non-string inputs for base or relative fields cause validation errors

## How this service works

Evidence-backed autonomous AI jobs and paid data tools. Queue/D1/cron run outside the chat; free quotas and bounded execution apply.

## Output

A JSON object containing a single 'url' field with the fully resolved, canonical absolute URL string produced by joining the base and relative inputs — e.g. {"url": "https://example.com/c?x=1"}.

## Request schema (JSON Schema)

```json
{
 "type": "object",
 "properties": {
  "base": {
   "type": "string",
   "maxLength": 2048,
   "description": "Absolute HTTP/HTTPS URL; parsed locally, never fetched."
  },
  "relative": {
   "type": "string",
   "maxLength": 2048,
   "description": "Relative URL or path."
  }
 }
}
```

## Response schema (JSON Schema)

```json
{
 "type": "json",
 "example": {
  "url": "https://example.com/c?x=1"
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/signaldesk-ai-url-join-eceed868/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from x402-agent.kariguetoazul.workers.dev](https://www.zero.xyz/host/x402-agent.kariguetoazul.workers.dev/llms.txt)